Fill neck for a fuel tank



FIG. 1 illustrates a side view of an ornamental design for a fill neck for a fuel tank according to the invention;

FIG. 2 illustrates a bottom view of the design of FIG. 1;

FIG. 3 illustrates a front view of the design of FIG. 1;

FIG. 4 illustrates a top view of the design of FIG. 1;

FIG. 5 illustrates a back view of the design of FIG. 1;

FIG. 6 illustrates an alternative embodiment in side view of the ornamental design for a fill neck for a fuel tank according to the invention;

FIG. 7 illustrates a bottom view of the design of FIG. 6;

FIG. 8 illustrates a front view of the design of FIG. 6;

FIG. 9 illustrates a top view of the design of FIG. 6; and,

FIG. 10 illustrates a back view of the design of FIG. 6. 

The ornamental design for the fill neck for a fuel tank substantially, as shown and described. 